Should The U.S. Ban Chinese and Russian Technology?

Every year, seemingly, there’s a new story of some software – like ‘Tik Tok’ or ‘FaceApp’ – from a hostile country that may or may not be a security threat to us in the west. So what should be done in cases like this? What if the U.S. just banned all technology from Russia and China? Is it a good idea? Is it even possible?